Bicycle exerciser



FIG. 1 is a perspective view of a bicycle exerciser showing my new design;

FIG. 2 is a top plan view thereof shown on a slightly reduced scale;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof shown on a slightly enlarged scale; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for a bicycle exerciser, substantially as shown. 